The Sierra Club has released a new iOS app, the Sierra Club Trail Explorer -- the only app you need to discover new places to enjoy the outdoors. Powered by AllTrails.com, Trail Explorer provides an easy way to explore and enjoy the wilderness in your own backyard and across the country. Browse and share more than 40,000 trails.

This spring, vicariously visit the Arctic in the new IMAX film To the Arctic, which follows a mother polar bear and her two cubs as they navigate their changing Arctic wilderness home and struggle to survive.

You wear your love of the outdoors on your sleeve -- now you can wear it on your shirt! The Sierra Club and Shirt.Woot, the online hub for T-shirt designers, have launched an Earth Day design contest with the theme of "Open Spaces."

The Shirt.Woot and Sierra Club communities will vote on designs. Submit a design and vote with the chance to win a prize pack. Entries must be submitted by April 18 and voting ends the next day. Best of all, the shirts will be available for purchase after the contest.

It's Time to Protect Our Wild Places

What do the Grand Canyon, California's Giant Sequoia National Monument, and Mount St. Helens have in common? All were permanently protected as national monuments by a sitting president.

President Obama has made Fort Monroe in Virginia a national monument, but there's much more he can do to establish his own conservation legacy -- starting with Fort Ord, a former Army post on the California coast that is home to mountain lions, golden eagles, and red-tailed hawks and is prized for hiking and cycling.

Author and poet Shelton Johnson wants to inspire urban youths and families to spend more time outdoors and reconnect with the wild places that shaped our history. A sought-after public speaker, he is the persuasive park ranger whose letter to Oprah Winfrey convinced her to go camping in a national park.

Johnson's first novel, Gloryland (Sierra Club Books), tells the story of an African American "buffalo soldier" who finds himself posted to the newly created Yosemite National Park.

Some 350,000 native hardwood trees will be planted over the next three years on the site of a former strip mine. It all started when Kentucky native John Cleveland, a newly hired Sierra Club organizer, discovered something fishy while poking around in the Fishtrap Lake watershed of far-eastern Kentucky....

Sound Off

Will the symphony of the Great Bear Rainforest -- one of the largest remaining tracts of unspoiled temperate rainforest left in the world -- be silenced by tar sands oil tankers?